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345 lines
13 KiB
JavaScript
345 lines
13 KiB
JavaScript
/**
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* @module ol/control/ZoomSlider
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*/
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var __extends = (this && this.__extends) || (function () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
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return extendStatics(d, b);
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};
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return function (d, b) {
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if (typeof b !== "function" && b !== null)
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throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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import Control from './Control.js';
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import EventType from '../events/EventType.js';
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import PointerEventType from '../pointer/EventType.js';
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import { CLASS_CONTROL, CLASS_UNSELECTABLE } from '../css.js';
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import { clamp } from '../math.js';
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import { easeOut } from '../easing.js';
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import { listen, unlistenByKey } from '../events.js';
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import { stopPropagation } from '../events/Event.js';
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/**
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* The enum for available directions.
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*
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* @enum {number}
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*/
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var Direction = {
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VERTICAL: 0,
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HORIZONTAL: 1,
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};
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/**
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* @typedef {Object} Options
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* @property {string} [className='ol-zoomslider'] CSS class name.
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* @property {number} [duration=200] Animation duration in milliseconds.
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* @property {function(import("../MapEvent.js").default):void} [render] Function called when the control
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* should be re-rendered. This is called in a `requestAnimationFrame` callback.
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*/
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/**
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* @classdesc
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* A slider type of control for zooming.
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*
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* Example:
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*
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* map.addControl(new ZoomSlider());
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*
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* @api
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*/
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var ZoomSlider = /** @class */ (function (_super) {
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__extends(ZoomSlider, _super);
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/**
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* @param {Options} [opt_options] Zoom slider options.
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*/
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function ZoomSlider(opt_options) {
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var _this = this;
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var options = opt_options ? opt_options : {};
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_this = _super.call(this, {
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element: document.createElement('div'),
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render: options.render,
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}) || this;
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/**
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* @type {!Array<import("../events.js").EventsKey>}
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* @private
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*/
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_this.dragListenerKeys_ = [];
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/**
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* Will hold the current resolution of the view.
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*
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* @type {number|undefined}
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* @private
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*/
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_this.currentResolution_ = undefined;
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/**
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* The direction of the slider. Will be determined from actual display of the
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* container and defaults to Direction.VERTICAL.
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*
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* @type {Direction}
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* @private
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*/
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_this.direction_ = Direction.VERTICAL;
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/**
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* @type {boolean}
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* @private
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*/
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_this.dragging_;
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/**
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* @type {number}
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* @private
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*/
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_this.heightLimit_ = 0;
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/**
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* @type {number}
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* @private
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*/
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_this.widthLimit_ = 0;
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/**
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* @type {number|undefined}
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* @private
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*/
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_this.startX_;
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/**
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* @type {number|undefined}
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* @private
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*/
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_this.startY_;
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/**
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* The calculated thumb size (border box plus margins). Set when initSlider_
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* is called.
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* @type {import("../size.js").Size}
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* @private
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*/
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_this.thumbSize_ = null;
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/**
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* Whether the slider is initialized.
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* @type {boolean}
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* @private
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*/
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_this.sliderInitialized_ = false;
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/**
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* @type {number}
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* @private
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*/
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_this.duration_ = options.duration !== undefined ? options.duration : 200;
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var className = options.className !== undefined ? options.className : 'ol-zoomslider';
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var thumbElement = document.createElement('button');
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thumbElement.setAttribute('type', 'button');
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thumbElement.className = className + '-thumb ' + CLASS_UNSELECTABLE;
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var containerElement = _this.element;
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containerElement.className =
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className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;
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containerElement.appendChild(thumbElement);
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containerElement.addEventListener(PointerEventType.POINTERDOWN, _this.handleDraggerStart_.bind(_this), false);
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containerElement.addEventListener(PointerEventType.POINTERMOVE, _this.handleDraggerDrag_.bind(_this), false);
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containerElement.addEventListener(PointerEventType.POINTERUP, _this.handleDraggerEnd_.bind(_this), false);
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containerElement.addEventListener(EventType.CLICK, _this.handleContainerClick_.bind(_this), false);
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thumbElement.addEventListener(EventType.CLICK, stopPropagation, false);
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return _this;
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}
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/**
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* Remove the control from its current map and attach it to the new map.
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* Pass `null` to just remove the control from the current map.
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* Subclasses may set up event handlers to get notified about changes to
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* the map here.
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* @param {import("../PluggableMap.js").default|null} map Map.
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* @api
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*/
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ZoomSlider.prototype.setMap = function (map) {
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_super.prototype.setMap.call(this, map);
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if (map) {
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map.render();
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}
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};
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/**
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* Initializes the slider element. This will determine and set this controls
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* direction_ and also constrain the dragging of the thumb to always be within
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* the bounds of the container.
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*
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* @return {boolean} Initialization successful
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* @private
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*/
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ZoomSlider.prototype.initSlider_ = function () {
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var container = this.element;
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var containerWidth = container.offsetWidth;
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var containerHeight = container.offsetHeight;
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if (containerWidth === 0 && containerHeight === 0) {
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return (this.sliderInitialized_ = false);
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}
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var containerStyle = getComputedStyle(container);
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containerWidth -=
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parseFloat(containerStyle['paddingRight']) +
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parseFloat(containerStyle['paddingLeft']);
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containerHeight -=
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parseFloat(containerStyle['paddingTop']) +
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parseFloat(containerStyle['paddingBottom']);
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var thumb = /** @type {HTMLElement} */ (container.firstElementChild);
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var thumbStyle = getComputedStyle(thumb);
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var thumbWidth = thumb.offsetWidth +
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parseFloat(thumbStyle['marginRight']) +
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parseFloat(thumbStyle['marginLeft']);
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var thumbHeight = thumb.offsetHeight +
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parseFloat(thumbStyle['marginTop']) +
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parseFloat(thumbStyle['marginBottom']);
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this.thumbSize_ = [thumbWidth, thumbHeight];
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if (containerWidth > containerHeight) {
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this.direction_ = Direction.HORIZONTAL;
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this.widthLimit_ = containerWidth - thumbWidth;
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}
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else {
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this.direction_ = Direction.VERTICAL;
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this.heightLimit_ = containerHeight - thumbHeight;
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}
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return (this.sliderInitialized_ = true);
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};
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/**
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* @param {PointerEvent} event The browser event to handle.
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* @private
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*/
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ZoomSlider.prototype.handleContainerClick_ = function (event) {
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var view = this.getMap().getView();
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var relativePosition = this.getRelativePosition_(event.offsetX - this.thumbSize_[0] / 2, event.offsetY - this.thumbSize_[1] / 2);
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var resolution = this.getResolutionForPosition_(relativePosition);
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var zoom = view.getConstrainedZoom(view.getZoomForResolution(resolution));
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view.animateInternal({
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zoom: zoom,
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duration: this.duration_,
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easing: easeOut,
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});
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};
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/**
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* Handle dragger start events.
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* @param {PointerEvent} event The drag event.
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* @private
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*/
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ZoomSlider.prototype.handleDraggerStart_ = function (event) {
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if (!this.dragging_ && event.target === this.element.firstElementChild) {
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var element = /** @type {HTMLElement} */ (this.element.firstElementChild);
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this.getMap().getView().beginInteraction();
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this.startX_ = event.clientX - parseFloat(element.style.left);
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this.startY_ = event.clientY - parseFloat(element.style.top);
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this.dragging_ = true;
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if (this.dragListenerKeys_.length === 0) {
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var drag = this.handleDraggerDrag_;
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var end = this.handleDraggerEnd_;
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var doc = this.getMap().getOwnerDocument();
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this.dragListenerKeys_.push(listen(doc, PointerEventType.POINTERMOVE, drag, this), listen(doc, PointerEventType.POINTERUP, end, this));
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}
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}
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};
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/**
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* Handle dragger drag events.
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*
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* @param {PointerEvent} event The drag event.
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* @private
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*/
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ZoomSlider.prototype.handleDraggerDrag_ = function (event) {
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if (this.dragging_) {
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var deltaX = event.clientX - this.startX_;
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var deltaY = event.clientY - this.startY_;
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var relativePosition = this.getRelativePosition_(deltaX, deltaY);
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this.currentResolution_ =
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this.getResolutionForPosition_(relativePosition);
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this.getMap().getView().setResolution(this.currentResolution_);
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}
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};
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/**
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* Handle dragger end events.
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* @param {PointerEvent} event The drag event.
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* @private
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*/
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ZoomSlider.prototype.handleDraggerEnd_ = function (event) {
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if (this.dragging_) {
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var view = this.getMap().getView();
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view.endInteraction();
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this.dragging_ = false;
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this.startX_ = undefined;
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this.startY_ = undefined;
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this.dragListenerKeys_.forEach(unlistenByKey);
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this.dragListenerKeys_.length = 0;
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}
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};
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/**
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* Positions the thumb inside its container according to the given resolution.
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*
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* @param {number} res The res.
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* @private
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*/
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ZoomSlider.prototype.setThumbPosition_ = function (res) {
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var position = this.getPositionForResolution_(res);
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var thumb = /** @type {HTMLElement} */ (this.element.firstElementChild);
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if (this.direction_ == Direction.HORIZONTAL) {
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thumb.style.left = this.widthLimit_ * position + 'px';
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}
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else {
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thumb.style.top = this.heightLimit_ * position + 'px';
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}
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};
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/**
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* Calculates the relative position of the thumb given x and y offsets. The
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* relative position scales from 0 to 1. The x and y offsets are assumed to be
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* in pixel units within the dragger limits.
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*
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* @param {number} x Pixel position relative to the left of the slider.
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* @param {number} y Pixel position relative to the top of the slider.
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* @return {number} The relative position of the thumb.
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* @private
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*/
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ZoomSlider.prototype.getRelativePosition_ = function (x, y) {
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var amount;
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if (this.direction_ === Direction.HORIZONTAL) {
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amount = x / this.widthLimit_;
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}
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else {
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amount = y / this.heightLimit_;
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}
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return clamp(amount, 0, 1);
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};
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/**
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* Calculates the corresponding resolution of the thumb given its relative
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* position (where 0 is the minimum and 1 is the maximum).
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*
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* @param {number} position The relative position of the thumb.
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* @return {number} The corresponding resolution.
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* @private
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*/
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ZoomSlider.prototype.getResolutionForPosition_ = function (position) {
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var fn = this.getMap().getView().getResolutionForValueFunction();
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return fn(1 - position);
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};
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/**
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* Determines the relative position of the slider for the given resolution. A
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* relative position of 0 corresponds to the minimum view resolution. A
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* relative position of 1 corresponds to the maximum view resolution.
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*
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* @param {number} res The resolution.
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* @return {number} The relative position value (between 0 and 1).
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* @private
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*/
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ZoomSlider.prototype.getPositionForResolution_ = function (res) {
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var fn = this.getMap().getView().getValueForResolutionFunction();
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return clamp(1 - fn(res), 0, 1);
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};
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/**
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* Update the zoomslider element.
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* @param {import("../MapEvent.js").default} mapEvent Map event.
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* @override
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*/
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ZoomSlider.prototype.render = function (mapEvent) {
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if (!mapEvent.frameState) {
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return;
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}
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if (!this.sliderInitialized_ && !this.initSlider_()) {
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return;
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}
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var res = mapEvent.frameState.viewState.resolution;
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this.currentResolution_ = res;
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this.setThumbPosition_(res);
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};
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return ZoomSlider;
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}(Control));
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export default ZoomSlider;
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//# sourceMappingURL=ZoomSlider.js.map
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